quantity 0.2.0

Facilitates working with physical quantities.

quantity

Facilitates working with physical quantities.

This is a work in progress; this package's API may change significantly.
Some parts are currently unfinished, untested and/or undocumented. Use at your own risk.

Quick start

// Import the core library
import 'package:quantity/quantity_si.dart';

// Construct an Angle in radians
var ang = new Angle(rad: 1.1);

// Construct an Angle in degrees
var ang2 = new Angle(deg: 270);

// Find the difference
var diff = ang2 - ang;

// Display the result in degrees
print(diff.valueInUnits(Angle.degrees);

Key Features

• Typed quantities (such as Length, Mass and Temperature) that are easy to construct and use in calculations.
• Encourages use of standard units by isolating non-standard units in an extension library.
• Support for relative standard uncertainty in quantity values and calculations.
• Allows use of arbitrary precision values (as well as complex and imaginary values).
• Provides access to the latest official constant values published by NIST.
• Integration with Dart's existing Duration and DateTime classes.
• Extensive set of quantity types and standard and non-standard units.
• Support for untyped quantities having unusual dimensions with the MiscQuantity class.
• Models quantity ranges, including special support for angle ranges and time spans.
• Includes a mutable quantity with streams.
• Metric prefixes for any unit.